IRS FIRE vs IRIS: What Changed and What You Need to Know
For decades, the IRS FIRE system was the only way to electronically file information returns like 1099 forms. The IRS has since replaced FIRE with a modern platform called IRIS (Information Returns Intake System). If you previously used FIRE — or a software provider that connected to FIRE — here is what changed and what it means for your filing process.
A Brief History of IRS E-Filing for Information Returns
The FIRE Era
The Filing Information Returns Electronically (FIRE) system was launched in the 1990s. It allowed businesses and transmitters to upload information returns to the IRS via a web-based upload portal. Despite the web interface, FIRE required data in a fixed-width ASCII text format defined in IRS Publication 1220. The system served its purpose for many years but was built on aging technology that was increasingly difficult to maintain and use.
The Transition to IRIS
The IRS announced IRIS as part of its technology modernization plan. The IRIS Taxpayer Portal launched in January 2023, initially supporting 1099 series forms. The IRIS A2A (Application-to-Application) channel for software transmitters followed, and the IRS progressively expanded the system's capabilities. The FIRE system was subsequently retired, making IRIS the sole electronic filing channel for information returns.
Key Differences: FIRE vs IRIS
| Feature | FIRE | IRIS |
|---|---|---|
| Technology | Legacy web portal with file upload | Modern web application and REST API |
| Data format | Fixed-width ASCII (Publication 1220) | XML-based schema for A2A; web forms for portal |
| Free portal for filers | No — required formatted file upload | Yes — free Taxpayer Portal with form-by-form entry |
| Bulk filing | File upload (one file per batch) | A2A API channel for automated bulk submission |
| Authentication | TCC (Transmitter Control Code) and PIN | IRS account with ID.me verification; TCC for A2A |
| Error handling | Batch-level error reports returned after processing | Real-time validation and immediate error feedback |
| Status tracking | Limited — check status days after upload | Real-time submission status via portal or API |
| Corrections | Upload corrected file in Publication 1220 format | Submit corrections through portal or A2A |
| Filing confirmations | Delayed confirmation via status check | Immediate acknowledgment upon successful submission |
| Current status | Retired | Active — sole IRS e-filing channel for information returns |
What Improved with IRIS
Modern Data Formats
FIRE required the notoriously difficult Publication 1220 fixed-width format, where a single misplaced character could invalidate an entire file. IRIS uses structured XML schemas for the A2A channel, which are far easier for software to generate and validate. The web portal eliminates formatting concerns entirely with a guided form interface.
Real-Time Feedback
With FIRE, you would upload a file and then wait — sometimes days — to learn whether it was accepted or rejected. IRIS provides immediate validation feedback, allowing filers and software to catch and correct errors before finalizing a submission.
Free Web Portal
FIRE had no practical way for a small business to e-file without software, since it required formatted data files. The IRIS Taxpayer Portal provides a free, browser-based interface where anyone can enter and submit information returns one at a time. This is a significant improvement for small businesses with limited filing volumes.
Stronger Security
IRIS uses modern authentication through IRS accounts with ID.me identity verification, replacing the older TCC-and-PIN model used by FIRE for individual filers. The A2A channel uses OAuth-based authentication for software transmitters.
API-Based Integration
The A2A channel uses RESTful API protocols, which are standard in modern software development. This makes it significantly easier for filing software providers to build and maintain connections to the IRS, ultimately resulting in more reliable filing experiences for end users.
What Filers Need to Do
Since FIRE has been fully retired, all filers must now use IRIS. Here is what that means depending on how you file.
If You Use Filing Software
Most filing software providers, including Thomas Ledger, have already transitioned to IRIS. If you use a software provider for your 1099 filings, confirm that your provider supports IRIS A2A filing. Your day-to-day workflow likely requires no changes — the software handles the connection to IRIS behind the scenes.
If You Previously Filed Through FIRE Directly
You will need to transition to either the IRIS Taxpayer Portal or an IRIS-connected software provider. If you filed through FIRE using custom-formatted files, be aware that the Publication 1220 format is no longer accepted. You will need to either:
- Use the IRIS Taxpayer Portal to enter forms manually
- Update your file generation process to produce IRIS-compatible XML
- Switch to a filing software that handles IRIS transmission for you
If You Filed on Paper
Paper filing is still available for filers submitting fewer than 10 information returns. However, the IRS strongly encourages e-filing, and the IRIS Taxpayer Portal makes it free and accessible. If you have been filing on paper, this may be a good time to switch to electronic filing. Learn more about e-filing 1099s online.
Transmitter Control Codes (TCCs)
If you are a software transmitter or were a FIRE transmitter with a TCC, note the following:
- TCCs issued for FIRE needed to be transitioned to IRIS. The IRS provided a migration path for existing TCC holders.
- New TCCs for IRIS are obtained through the IRS's online application process.
- If you file through a software provider like Thomas Ledger, you do not need your own TCC — the provider's TCC is used for transmission.
Frequently Asked Questions
When was the IRS FIRE system shut down?
The IRS retired the FIRE system after transitioning filers to the newer IRIS platform. IRIS launched its Taxpayer Portal in January 2023 and progressively took over all electronic information return filing. If you previously used FIRE, you now need to use IRIS or a software provider that connects to IRIS.
Do I need a new Transmitter Control Code (TCC) for IRIS?
If you had a TCC under the FIRE system, the IRS provided a migration path to transition it to IRIS. New TCCs are obtained through the IRS's online application process. If you file through a software provider, you do not need your own TCC because the provider's TCC is used for transmission.
Is IRIS more reliable than FIRE was?
IRIS offers significant reliability improvements over FIRE. It provides real-time validation and immediate error feedback, whereas FIRE required you to wait days to learn if your file was accepted or rejected. The modern REST API architecture also makes it easier for software providers to build stable, dependable connections to the IRS.
Can I submit corrections through IRIS?
Yes. IRIS supports corrected filings through both the free Taxpayer Portal and the A2A channel used by software transmitters. This is an improvement over FIRE, which required uploading a corrected file in the Publication 1220 fixed-width format. Learn more about the IRIS filing process.
Will there be more changes to IRS e-filing after IRIS?
The IRS continues to expand IRIS capabilities, adding support for additional form types beyond the 1099 series. While no replacement for IRIS has been announced, the IRS's modernization efforts mean the platform will continue evolving. Staying with a filing provider that keeps up with IRS changes helps ensure you remain compliant without having to track every update yourself.